djvu | f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f

General

Target

f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
Size

786KB
MD5

c6ccfe902f34b0d3ca43f79c26176f66
SHA1

8355d1df0b7da670ef92048fe5f129d3d835a776
SHA256

f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f
SHA512

e76046768e506fe61750dd5489e3cdbc74b3254ba4336ffcadd45b35736f18a8f6610971ad89aea83ebba233939c16f5b94638a40145493e915486fd0d7ecdab
SSDEEP

12288:g0+ofn97OtdANmvyAsi7d0fZ4FVPelPMR5VDb40uKc4aaFZWVupZcl1JN:jn9iKmB0fZ4FVPeoFbtuKc4ak6JN

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes

extension
.mlrd
offline_id
FjtJkuhRHnUARRt9GnbbgUTa6ErhJq4ZM668xSt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-xN3VuzQl0a Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0805JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/3812-2-0x00000000040A0000-0x00000000041BB000-memory.dmp	family_djvu
behavioral1/memory/1636-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1636-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4400-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4400-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4400-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Control Panel\International\Geo\Nation	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3388	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8e475fae-7d5b-418c-8753-b05b328c9bf3\\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe\" --AutoStart"	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	api.2ip.ua
14	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3812 set thread context of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 4888 set thread context of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1660	4400	WerFault.exe	88

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 3812 wrote to memory of 1636	3812	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	84
PID 1636 wrote to memory of 3388	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	85
PID 1636 wrote to memory of 3388	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	85
PID 1636 wrote to memory of 3388	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	85
PID 1636 wrote to memory of 4888	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	86
PID 1636 wrote to memory of 4888	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	86
PID 1636 wrote to memory of 4888	1636	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	86
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88
PID 4888 wrote to memory of 4400	4888	f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe	88

C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
"C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3812
- C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
  "C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8e475fae-7d5b-418c-8753-b05b328c9bf3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3388
- - C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
    "C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4888
  - - C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe
      "C:\Users\Admin\AppData\Local\Temp\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4400
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 568
        5⤵
        Program crash
        
        PID:1660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4400 -ip 4400
1⤵
PID:3944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\8e475fae-7d5b-418c-8753-b05b328c9bf3\f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f.exe

Filesize
786KB

MD5
c6ccfe902f34b0d3ca43f79c26176f66

SHA1
8355d1df0b7da670ef92048fe5f129d3d835a776

SHA256
f1944773e9001cabb9591ccd55f54f6fe02bca0e4beb1b322118a9a14f92993f

SHA512
e76046768e506fe61750dd5489e3cdbc74b3254ba4336ffcadd45b35736f18a8f6610971ad89aea83ebba233939c16f5b94638a40145493e915486fd0d7ecdab

Download Submit
memory/1636-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1636-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3812-1-0x0000000003FD0000-0x0000000004062000-memory.dmp

Filesize
584KB

Download
memory/3812-2-0x00000000040A0000-0x00000000041BB000-memory.dmp

Filesize
1.1MB

Download
memory/4400-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4400-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4400-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4888-18-0x0000000003E80000-0x0000000003F16000-memory.dmp

Filesize
600KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads